list():Returns   an   array   of   strings   naming   the   files   and   directories   in   the   directory   denoted   by   this   abstract   pathname.
以绝对路径返回该目录下所有的文件名的一个字符串数组.
listFiles():Returns   an   array   of   abstract   pathnames   denoting   the   files   in   the   directory   denoted   by   this   abstract   pathname.
以相对路径返回该目录下所有的文件名的一个字符串数组.

 

 

list() will return an array of strings naming the files and directories in the given directory. The file names are not complete path but just file/directory names.

listFiles() will return an array of File objects.

In both the cases the order in which the file names appear are not alphabetically ordered.

import java.io.File;

/**
* @author Madan Kumar K
*
*/
public class ListFiles {
public static void main(String[] args) {
String dir = System.getProperty(“user.dir”);
File f = new File(dir);
String[] fileNames = f.list();
for(int i=0; i < fileNames. length; i++)
System.out.println(fileNames[i]);

File[] files = f.listFiles();
for(int i=0; i < files.length; i++)
System.out.println(files[i]);
}
}

listRoots() is used to list the file system roots. For a windows platform roots mean the drives, while on a UNIX platform there is a single file system; that is “/”. You can list the roots using.

File[] roots = f.listRoots();
for(int i=0; i < roots.length; i++)
System.out.println(roots[i]);